Refractometer calibration solution

[jhj0112]

ummm.... am I supposed to calibrate this often? maybe I'm lucky but I have not calibrated it for over 4 years... -.-

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[Frogger]

Originally Posted by jhj0112

ummm.... am I supposed to calibrate this often? maybe I'm lucky but I have not calibrated it for over 4 years... -.-

Sent from my SM-G930W8 using Tapatalk

Depending on the refractometer you have. My first one a Vertex I needed to calibrate almost every time I used it. My new one a Tropic Eden pro-1 normal seawater refractometer I have only had to tweak it a bit over the past 6 months. I still check it a couple times a month. The Tropic Eden is a way better unit then the Vertex.

Do not use the Sybon Standard Seawater Saline because it is almost 4ppT off.

I use the Pinpoint solution and find it more accurate. Also old calibration solutions are not always accurate.

[calo247]

i wonder if the electronic testers are immune to this problem as they use conductivity?